Not so much a point as a jest. It probably falls flat over cultural/regional differences.
I grew up in the South. The Confederate flag is like wallpaper to me. I don't see its display as 'worse' than the adventures in racial sensitivity of Robert Sr. and Jr.
ETA: I wanted to mention the pro-GZ demonstration because it's the only one I have heard of so far, except the handful at the courthouse during deliberations. I mentioned the Confederate flag because I felt it would be misleading to leave it out. It wasn't my intention to be inflammatory, but I suspect the whole sub-thread will be deleted.
Okay, I see where you were going with that now.
If they'd gone with the flag of the Republic of Texas, or a picture of the Alamo, I could see that as just a reflection of that stubborn Texas independence streak, but there can't be any way they don't know that the Stars and Bars are just a big ol' FU to black people in general and pretty close to saying "What happened was okay because Martin was black and George was close enough to white".
I hope they're going to have a lot of HPD present when demonstration meets counter-demonstration, because I suspect a lot more than a civil exchange of views and opinions is on tap.